Thank you for all the replies! The consensus seems to be that I not waste time trying to find a stand-alone manual for the trailer, but to identify the makers and models of appliances and options to use the separate manuals. This works in most cases. In others, as with the front landing legs, the model numbers that would tell me the capacity seem to be hidden inside the trailer siding, so I will need to make an "informed guess". I did manage to change the tires, and had to do this myself because I was reluctant to move the trailer on its old tires that were deeply cracked at the base from sitting so long. I could easily see the frame at the rear of the trailer for placing a jack and back-up stands. The front was more difficult since the instructions told me not to rely on the lift legs, but the frame is covered. So I assumed where it should be and used floor jacks to back-up the lift legs. After research on tires and calculating loads, I agree that there is a lot of anecdotal information. But it turns out that choices are limited. The trailer had load range E LT tires that were close to their maximum load capacity. Having seen the damage that a failed tire can do to the side of a trailer, and thinking about the cost of fixing it, I spent a little more to get load range G steel wall LT tires running at a pressure (recommended by the tire shop) that is safe for the wheels. I have also checked to see that the truck I am using (Dodge Ram 2500 with the 6.4 liter diesel engine) can safely and legally pull the trailer. Having pulled stock trailers, I am sure it has the power, but handling, stopping, legal loads, and my California drivers license still needed to be confirmed. It turns out that things are close to legal limits, but okay. I am still frustrated with draining and sanitizing the fresh water system. The water lines are mostly hidden, so I am guessing at drain points, and the trailer was last filled years ago with untreated well water. So before my family uses it, I want to drain and flush the fresh water tanks and lines, fill them with treated water, and then flush them again. Right now, all pop-outs and appliances seem to work (after switching to a filled LP gas tank), but I agree that these all need to be checked again and operation confirmed before towing the trailer away from nearby repair shops. It is a very nice trailer, especially for a beginner, and I want to keep it that way. Sorry for the long message, but I am new at this with many questions, so any advice is greatly appreciated.
JRMunn